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The ESAB / Thermal Dynamics 21-1284 is a precision-engineered plasma arc cutting consumable designed for heavy industrial automated and mechanized CNC plasma systems. It functions as the primary shield gas distributor for the torch head, specifically optimized to support high-amperage cutting applications and manage fluid-dynamic swirl on secondary gases around the central plasma arc.
Features
Laminar Curtain Formation: Organizes high-velocity incoming shield gas into a smooth, concentric curtain to isolate the molten puddle from ambient air
Dross Mitigation: Precise velocity vector expels molten metal from the kerf to produce clean, square edges
Arc Coaxial Constriction: Stabilizes the core plasma arc path to prevent erratic movement, micro-bevelling, and cut path deviation
Internal Component Cooling: Fluid-dynamic gas path allows incoming shield gas to extract residual heat from the electrode and nozzle assembly
Thermal Shock Resistance: Engineered to minimize thermal degradation during rapid starting and stopping of the arc
Dielectric Strength: High electrical insulation layer isolates the grounded torch shield cap from the active negative potential of the electrode
Contamination Prevention: Prevents oxidation, nitrogen contamination, and root porosity in non-ferrous metals
Specifications
Manufacturer: ESAB / Thermal Dynamics
Manufacturer Part Number (MPN): 21-1284
Airgas Part Number: TDC21-1284
Amperage Rating: 300 Amps
Target Material Profiles: Stainless Steel, Aluminum
Primary Shield Gas Compatibility: H35 (35% Hydrogen / 65% Argon)
Secondary Gas Compatibility: Hydrogen/Argon binary shielding gas mixtures
Torch Compatibility: Thermal Dynamics XT-300 Series automated/CNC machine plasma torches
Consumable Classification: Gas Distributor / Plasma Swirl Ring
Unit Package Dimensions: 1.2 inches x 4.0 inches x 7.3 inches
Alternative Package Dimensions: 6.0 inches x 1.0 inch x 1.0 inch
Net Mass / Weight: Approximately 3.0 lbs (industrial shipping crate/multi-unit context)
Country of Origin: United States
Base Material Matrix: High-temperature resistant composites and treated alloy cores